SS-ETS-300356-18 | Integrated Services Digital Network (ISDN) - Signalling System No.7 - ISDN User Part (ISUP) version2 for the international interface - Part 18: Completion of Calls to Busy Subscriber (CCBS) supplementary service | Document Center, Inc.

SS-ETS-300356-18 › Complete Document History
Integrated Services Digital Network (ISDN) - Signalling System No.7 - ISDN User Part (ISUP) version2 for the international interface - Part 18: Completion of Calls to Busy Subscriber (CCBS) supplementary service

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EDITION 1 - ENGLISH LANGUAGE EDITION - June 30, 1995